it's not hard NOW. it will get harder when you have to take more time every day on them. no, it's not hard, it's time consuming. you will need a couple hours a day for them between feeding and water changing. and when it comes to jarring it will take even more time.

and yeah you'll also need a way to cull them. a bigger predatory fish is my preferred method. easiest way imo.

The Mexican turbo snail (Turbo fluctuosa) does not generally breed successfully aquariums. There are no definite ways to distinguish males from females. You can expect your snail to live for 1-2 years, but some specimens get a bit older than this.